Method and system for implementing usage monitoring control

1. A method for implementing usage monitoring control, comprising: making, by a Policy and Charging Rules Function (PCRF), a usage monitoring policy for each IP Connectivity Access Network (IP-CAN) session or service data flow that shares a total allowanced usage according to the total allowanced usage shared by multiple users; performing, by a Policy and Charging Enforcement Function (PCEF), a usage monitoring according to the usage monitoring policy sent by the PCRF, and reporting, by the PCEF, a usage to the PCRF; deducting, by the PCRF, a consumed usage from the total allowanced usage shared by the multiple users after the PCRF receives the usage reported by the PCEF; wherein the total allowanced usage shared by multiple users is obtained by the PCRF from a Subscription Profile Repository (SPR), the total allowanced usage shared by multiple users is comprised in a user subscription information returned by the SPR and a user ID list of the users sharing the total allowanced usage is returned to the PCRF by the SPR.

2. The method according to claim 1 , wherein the usage monitoring policy comprises a usage threshold allocated by the PCRF for each IP-CAN session or service data flow that shares the total allowanced usage.

3. The method according to claim 2 , further comprising: when all IP-CAN sessions of all users that share the total allowanced usage are terminated, storing, by the PCRF, a remaining total allowanced usage in the SPR.

4. The method according to claim 1 , wherein when a first user in the multiple users requests to establish an IP-CAN session, obtaining, by the PCRF, the total allowanced usage shared by the multiple users from the SPR, and the total allowanced usage is comprised in the user subscription information returned by the SPR; and the SPR returns the user ID list of the users sharing the total allowanced usage to the PCRF.

5. The method according to claim 4 , wherein the step of making, by the PCRF, the usage monitoring policy for each IP-CAN session or service data flow that shares the total allowanced usage according to the total allowanced usage shared by the multiple users is: allocating, by the PCRF, a first usage threshold for the first user of the multiple users according to the obtained total allowanced usage shared by the multiple users, wherein the first usage threshold is less than or equal to the total allowanced usage.

6. The method according to claim 5 , wherein when a second user in addition to the first user in the multiple users requests to establish an IP-CAN session, the step of making, by the PCRF, a usage monitoring policy for each IP-CAN session or service data flow that shares the total allowanced usage according to the total allowanced usage shared by the multiple users is: determining, by the PCRF, that the IP-CAN session established for the first user and the IP-CAN session established for the second user share the total allowanced usage according to the user ID list; allocating, by the PCRF, a second usage threshold for the second user according to the total allowanced usage, and a sum of the first usage threshold and the second usage threshold is less than or equal to the total allowanced usage.

7. The method according to claim 6 , wherein the first usage threshold or the second usage threshold is for all service data flows of any one of the IP-CAN sessions, or for one or more service data flows of any one of the IP-CAN sessions.

8. The method according to claim 7 , wherein when the first usage threshold or the second usage threshold is for all service data flows of any one of the IP-CAN sessions, the PCRF does not make a Monitoring Key comprised in Policy and Charging Control (PCC) rules; when the first usage threshold or the second usage threshold is for one or more service data flows of any one of the IP-CAN sessions, but not for all of the service data flows, the PCRF makes the Monitoring Key comprised in the PCC rules corresponding to the service data flows and then provides, and PCC rules with the same Monitoring Key share the usage threshold of the Monitoring Key.

9. The method according to claim 5 , wherein the first usage threshold or the second usage threshold is for all service data flows of any one of the IP-CAN sessions, or for one or more service data flows of any one of the IP-CAN sessions.

10. The method according to claim 1 , further comprising: when all IP-CAN sessions of all users that share the total allowanced usage are terminated, storing, by the PCRF, a remaining total allowanced usage in the SPR.

11. The method according to claim 2 , wherein when a first user in the multiple users requests to establish an IP-CAN session, obtaining, by the PCRF, the total allowanced usage shared by the multiple users from the SPR, and the total allowanced usage is comprised in the user subscription information returned by the SPR; and the SPR returns the user ID list of the users sharing the total allowanced usage to the PCRF.

12. The method according to claim 11 , wherein the step of making, by the PCRF, the usage monitoring policy for each IP-CAN session or service data flow that shares the total allowanced usage according to the total allowanced usage shared by the multiple users is: allocating, by the PCRF, a first usage threshold for the first user of the multiple users according to the obtained total allowanced usage shared by the multiple users, wherein the first usage threshold is less than or equal to the total allowanced usage.

13. The method according to claim 12 , wherein when a second user in addition to the first user in the plurality of users requests to establish an IP-CAN session, the step of making, by the PCRF, a usage monitoring policy for each IP-CAN session or service data flow that shares the total allowanced usage according to the total allowanced usage shared by the multiple users is: determining, by the PCRF, that the IP-CAN session established for the first user and the IP-CAN session established for the second user share the total allowanced usage according to the user ID list; allocating, by the PCRF, a second usage threshold for the second user according to the total allowanced usage, and a sum of the first usage threshold and the second usage threshold is less than or equal to the total allowanced usage.

14. The method according to claim 13 , wherein the first usage threshold or the second usage threshold is for all service data flows in any one of the IP-CAN sessions, or for one or more service data flows in any one of the IP-CAN sessions.

15. The method according to claim 12 , wherein the first usage threshold or the second usage threshold is for all service data flows of any one of the IP-CAN sessions, or for one or more service data flows of any one of the IP-CAN sessions.

16. The method according to claim 15 , wherein when the first usage threshold or the second usage threshold is for all service data flows of any one of the IP-CAN sessions, the PCRF does not make a Monitoring Key comprised in Policy and Charging Control (PCC) rules; when the first usage threshold or the second usage threshold is for one or more service data flows of any one of the IP-CAN sessions, but not for all of the service data flows, the PCRF makes the Monitoring Key comprised in the PCC rules corresponding to the service data flows and then provides, and PCC rules with the same Monitoring Key share the usage threshold of the Monitoring Key.

17. A system for implementing usage monitoring control, at least comprising a PCRF, a PCEF and an SPR, wherein, the PCRF is configured to make a usage monitoring policy for each IP-CAN session or service data flow that shares a total allowanced usage according to the total allowanced usage shared by multiple users; send the usage monitoring policy to the PCEF, receive a usage reported by the PCEF, and deduct a consumed usage from the total allowanced usage; the PCEF is configured to perform a usage monitoring according to the usage monitoring policy sent by the PCRF, and report the usage to the PCRF; the SPR is configured to store the total allowanced usage shared by the multiple users and user IDs of the users that share the total allowanced usage; the PCRF is further configured to obtain the total allowanced usage shared by the multiple users and a user ID list of the users sharing the total allowanced usage from the SCR, wherein the total allowanced usage shared by multiple users is comprised in a user subscription information returned by the SPR.

18. The system according to claim 17 , wherein the PCRF is further configured to store a remaining total allowanced usage in the SPR when all IP-CAN sessions of all users that share the total allowanced usage are terminated.